"Let's meet at the place where it all began." The true plot is revealed as Takuru travels to the Hikariwo. There he eets the other person behind the series of brutal killings.  But a deeper mystery lurks in the background: what Serika is telling him doesn't make sense, and he's convinced that as horrible as the story is, there's more to it than even he knows.
And Dad did this to celebrate 
us getting into school.
وفعل أبي هذا للاحتفال بارتيادنا للمدرسة
Außerdem wollte Papa doch
unseren Schuleintritt feiern.
Además, papá lo hizo para celebrar
que ingresamos a la escuela.
Además, papá lo ha hecho para celebrar
que hemos entrado en la escuela.
En plus, c’est pour célébrer
notre inscription…
E poi il papà l'ha fatto per festeggiare
il nostro ingresso a scuola,
E o papai fez isso para 
comemorarmos a matrícula na escola.